Bucker tool



March 28, 1950 D. N. GOLDBQERG 2,502,255

BUCKER TOOL Filed March 19, 1946 2 Sheets-Sheet 1 -,D,1\/.a0 Mir;

D. N. GOLDBERG BUCKER TOOL March 28, 1950 2 Sheets-Sheet 2 Filed March 19, 1946- Patented Mar. 28, 1 950 STATES PATENT OFFICE BUCKER TOOL David N. Goldberg, Wheeling, W. Va.

Application March 19, 1946, Serial No. 655,556

The present invention relate to improvements in a rivet bucker tool, and has for its object to provide a simple, efficient and inexpensive device of this character.

One of the main objects of the present invention is to improve upon the form and construction and manner of functioning of a tool formerly devised by me of the same character described in my pending application for patent thereon.

Another object of the invention is to provide a rivet bucker tool which is so constructed and whose parts are so assembled that the rivet head of the tool can be un versally shifted about with relation to the work with which it is to be brought into engagement.

A further object thereof is to provide linkage controlled and operated means for varying the application of pressure upon the rivet head of the tool in such a manner that exertion is not required of the operator.

A still further object thereof is to provide a lever operated means of swivelling the tool relatively to the rivets to be bucked, as well as lever operated means for adjusting the pressure to be imposed by the rivet head of the tool against the rivets it engages.

Another object thereof is to provide pressure regulating means for a rivetbucker tool which operates, pliers-like, upon separation of oppositely arranged handles.

A further object thereof is to provide, in a device as described, improved means for centering the tool with reference to the rivets to be impacted.

Another object thereof is to provide, in a device as described, improved means for assembling the various parts of the device with due regard to replacements'renewals and ease of functioning.

Another object thereof is to provide a compact form of tool for the purpose described, through which a maximum and minimum predetermined degree of pressure can be applied by means of the rivet head of the tool against the rivets engaged by same, without removing any part from the device, all parts being self-contained.

With the above and other objects in view, my invention consists in the combination, arrangement and details of construction disclosed in the drawings and specifications and then more particularly pointed out in the appended claims.

In; the drawings:

Figure 1 is a side elevation of my invention,

4 Claims. (Cl. 7853.5)

2 showing some parts in a qualified dotted-line indicated position.

Figure 2 is a top plan view thereof.

Figure 3 is a front end elevation thereof.

Figure 4 is a fragmental detail view in longitudinal sectional elevation of the linkage, and

Figure 5 is a fragmental cross sectional view of a swivel means.

Referring to the drawings, which are merely illustrative of the present invention the various parts thereof are detailed. A suitable rigid standard or frame is provided for the tool consisting of a rectangular base member ID from which projects Vertically a pair of rigid oppositely arranged uprights II and I2, the lower ends preferably jutting outwardly laterally from base member ID.

A pair of oppositely arranged runners continue the base line of the standard from the uprights to a pair of oppositely disposed jaws or abutments I6 and Ilia. These runners consist of parallel arm extensions formed upon uprights II and I2, forwardly converging arms I4, I ia formed as extensions of the arms I3 and I 3a, parallel disposed arms I5, Ilia formed upon arms I4, Ida, which are in closer proximity to each other than parallel arms I5, 15a. These anvil jaws I6 and I6a are formed with outer vertically inclining edges ll which taper towards the upper ends of these jaws from the arms I5, I5a. From Figure 3 it is readily seen that the converging arms I4, Ma of the frame extend upwardly with respect to the adjacent parts of the runners, acting as gussets to reinforce these parts.

Extending across, so as to span the uprights II and I2, near their upper ends, is a guide rod I9 having a head 29 abutting upright II, and having screw threads at its other end as at 22, where it is engaged by a nut 2| for clamping the rod onto these uprights. A reinforcing bracing and stop member 23 is fixed between the uprights II and I2 and acts as a stop for a purpose soon to be described.

The collar portion 25 of. a slide, is formed with a pair of closely contiguous arms 26 and 21 which, between their ends, are pivotally mounted upon the rod I9. These arms are reduced at their outer ends, as at 3!) and 3! respectively to provide a recess 28 between them into which extends at right angles a screw bolt 3 la, having a head 32 abutting the terminal arm 3|, and having a cotter pin removably secured in its opposite end, as at 33. The straight arm 34, of an operating handle lever. which is offset to provide the curved handle 35, is pivotally mounted upon pivot pin am, the anvil carrying bar 49 being the main operating handle of the present tool.

This bar 49 is a straight rod which is slidable for endwise adjustment in the collar 25. The inner end of the auxiliary handle lever 54 terminates in advance of the uprights II and i2, and it is received between the oppositely arranged arms 39 and 49 of a fork lever or link M which has its shank, in turn, received between oppositely arranged arms 45 and 46 of a fork lever 46a. A pivot pin passes through arms 39, 49 and the auxiliary lever 34 having its head 38 abutting arm 40, and a cotter pin on this pin 31 abutting arm 35. Another pivot pin 42 passes through arms 45, 46 and through the fork arm lever 46a, having a head 43 abutting arm 46 and a cotter pin on this pin abutting arm 45.

The fork lever 46a is pivotally suspended dependingly from pivot pin 42, as shown in Figure 1, and it carries at its lower end, a nut 4'! into which is adjustably threaded the screw threaded end 48 of the bar 49. At the outermost extremity of bar 49 it is formed with a coaxial screw threaded bore 59, shown in Figure 4, and screwed home therein is the plug end 5i formed as a reduced portion on a polygonal head 52 upon which it is formed so as to extend in advance thereof coaxially of the plug 5i the rivet engaging head or pin 53.

A lug 54 is formed at right angles upon the under edge of the curved arm 35 of the auxiliary lever or handle 34, at its innermost end.

The relative position of all of the parts are fully shown in Figure 1. Atlhough collar 25 is pivotally suspended upon rod !9, because it rests upon the stop member 23, bar 49, which projects through it, is disposed in a horizontal position. It is held and supported in this position, at its outer end, by the depending fork lever 46a, which is perpendicularly disposed with respect to the outer end of the fork link 4|. Since lug 54 of the auxiliary handle 34 also rests upon the horizontally disposed bar 49, its straight portion 34 and this bar 49 maintain with link 4| a parallel relationship. By taking hold of the auxiliary lever arm 35 and depressing it, lug 54 pushes the bar 49 downwardly with itself, so both handles may rock upon guide rod l9 as an axis, both handles being closed upon each other.

In operation, the stock consisting of parts A and B, usually friction brake linings on certain sizes of brake bands such as are used on large shovels, cranes, etc., which are to be riveted, are to have the rivet D pressed thereinto as they frictionally abut the anvil uprights l5 and Ma. The present tool works on the leverage pressure principle. By turning the bar 49 its threads 43 engage the threads of the nut 47. The latter is held against rotation on this post by link 44 so the bar 49 may be advanced with its rivet head 53 approaching nearer to the rivet D or be caused to recede and be retracted therefrom, as may be desired for depth adjustment.

Once the handle bar 49 has been set to determine the distance the working end of rivet head 53 shall be spaced from the work or stock to be bucked, bar 49 is taken hold of by the operator, and lowered to raise link arm 45a and auxiliary handle lever 34 along with it, or both handles 35 and 4% may, pliers-like, be grasped together and swung downwardly to position handle bar 49 some degrees above its horizontal position. By pressing down upon these handles, pressure is exerted upon the rivet head to force or hold the rivet D securely in position so that the usual rivet shaft which extends on the other side of the band or plate of the brake linings, can be clinched either by hammering, or by any other pressure method.

For the purpose of regulating the amount of pressure to be imposed upon the mentioned rivet when the rivet head 53 of handle 49 is brought down into engagement with same, while the link ends of the two levers are in upraised position, shown in dotted lines in Figure 1, auxiliary handle 35 may be forced apart and separated from handle bar 49. As soon as auxiliary lever 54 swings upon pivot pin 32, as both handles are forced apart, the link 4| and adjacent lever end of handle 34 break straight line joint, and what results is: lever 34 moves towards guide 19 in one direction of movement, which rocks link 4| so that its outer ends or arms move in the direction of bar 49, being pulled forwardly at the same time in the direction of guide l9; hence, suspended link 4511 also moves forwardly towards uprights H and i2, and having a rigid threaded connection to the bar 48, the latter also being slightly moved backwardly so that its rivet head 53 has been slightly retracted, being now nearer to uprights H and 12 than when the parts occupy the positions shown in full lines in Figure 1. Still holding the two handles 35 and 49 separated, the operator rocks them both upon guide rod l9 so the link 46 begins to move downwardly with rivet head 53, and when the latter engages the rivet D, by squeezing both handles together, pliers-like, the link joint between the two handles may straighten out, more or less, which results in advancing rivet head 53 forwardly with increased pressure against the work parts A and B.

I do not intend to confine myself to the exact details of construction save as pointed out in the appended claims.

I claim:

1. A rivet bucker tool comprising a pair 01'; spaced uprights, a pair of upstanding spaced apart jaws fixedly carried by said uprights forwardly thereof, a guide rod fixed between said uprights, adjacent the upper ends thereof, a slide loosely engaging said rod and mounted for sliding and rocking movement relative thereto, an anvil carrying bar slidably extending through said slide below said rod and disposed at right angles to the latter, an anvil pin carried by the forward end of said bar, an elongated handle rockably carried by said slide above said guide rod, and means connecting said handle with said bar adjacent the forward end of the latter whereby rocking of said handle in one direction will effect forward movement of said bar to operative position.

2. A rivet bucker tool comprising an upright support, a pair of spaced jaws fixed relative to said support, a rock member carried by said support, an anvil carrier slidably carried by said rock member and having the forward end thereof projecting in the direction of said jaws, an anvil carried by the forward end of said carrier, and means rockably carried by said rock member connected with said carrier for moving the latter endwise.

3. A rivet bucker tool comprising an upright support, a pair of spaced jaws fixed relative to said support, a rock member carried by said support, an anvil carrier slidably carried by said rock member and having the forward end thereof projecting in the direction of said jaws, an anvil carried by the forward end of said carrier,

support, a pair of spaced jaws fixed relative to said support, a rock member carried by said support, an anvil carrier slidably carried by said rock member and having the forward end thereof 10 N b r projecting in the direction of said jaws, an anvil carried by the forward end of said carrier, means rockably carried by said rock member connected with said carrier for moving the latter endwise, and means limiting the movement in one 15 1,541,07 9

direction of said firstnamed means relative to said rock member.

DAVID N. GOLDBERG.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date 1,267,573 Monson May 28, 1918 1,320,830 Bolund Nov. 4, 1919 1,332,620 Fitzgerald Mar. 2, 1920 1,349,213 Lawrence Aug. 10, 1920 Tissler June 9, 1925 

